{% extends "base.html" %} {% load static %} {% block extra_head %}
{% endblock extra_head %} {% block main %} {% if user.is_authenticated %}

<div class="w-75 h-100">
  <section>
    <h3 id="loc3"><strong>常见潜艇噪音对比</strong></h3>
    <img id="spd_noise-01" src="/media/tutorial/spd-noise-01.png" alt="" class="ms-4 " />

  </section>
</div>

{% else %} {% include "pcs_login.html" %} {% endif %} {% endblock %}
